Bran-duster



CARRGL HUGHES;

Bran Dusten, No. 8,014. Pa tehted April 1, 1851.

N PETERS FholvLhhognpher, Washingicm D (1 [cm 7 TED sums PATENT OFFICE.

CARR AND J MEsHUeHEs, or oAMBRrnen, INDIANA.

. BRAN-DUSTEBL,

Specification of LettersIatent No. 8,014, datedApril 1, 1851.

Terr ll whom} it may concern Be it known that we, J. M. CARR and JAMES HUGHES, ofCambridge City, in the county of Wayne and Stateof Indiana, have invented certain Improvements in Machin cry for Separating Flour from Bran, and that the following is a full, clear, and exact description of the principle or character which distinguishes them from all other things before known, and of the usual manner of making, modifying, and using the same, reference being had to the accompanying drawings, of which- Figure 1: is a top plan and 2 a -vertical section. i r

Amachine for the above purpose was patented last year by Frost and Monroe which has been found defective and inoperative in practicefor the following causes: viz: The runner being solid throughout the length, and the space between it and the' standing bolt being nearly all occupied with the beaters and scourers, the air which enthe bran, as in the above mentioned ma-.

chine, but not, requiring a velocity ofthe runner of more than half the number of revolutions per minute; and the weight of the running cylinder being one third less, the wear and tear isproportionally reduced.

Part of our improvements consists in admitting a current of air to the center of the revolving fan which current canfbe regulated in quantity by a valve or register, and

by admitting more or less air thereby, to the interior of the apparatus, the force of. the blast through the bolting cloth is controlled. We also provide a sliding plate to regulate the amount of air admitted at the hopper along with the bran, by which in conjunction with the current of air admitted below, the working of the machine can be adjusted to suit the difierent states of the atmosphere and other contingencies by which the opera tion is affected.

x In the drawings, (a) is the frame in which are thebearings of the verticalshaft x (0) is the casing of theupper part, having a hopper Z)surroundingtheshaft. p

e) isthe pipe which conveysthe bran to the hopper (d). The outer casing (f) of the lower part is of sheet iron, and is in pieces like shutter, and attached to the corner posts of the frame. (9) is the runner head revolving with the shaft (6). Its cylindrical surface is covered with spikes arranged in rings, which run between other rings of stationary spikes projecting inward, driven into the interior surface of the casing l Below the runner (9) isa revolving fan (It) the wings of which run within a short distance of a cylindrical bolting cloth (i) which forms the inner casing of the lower part of the apparatus. H

x The bottom of the chamber is furnished witha passage for the escapeof the bran' after being acted on; and. also a tube (Z) through which air is admitted to the center of the fan The tube (Z) has a sliding valve or register (m) to regulate the quantity ofair admitted.

The opening of the hopper .(cl) through which the bran is admitted to the machine is furnished with a sliding valve which closes all the opening if desired, excepting where the bran enters through the spout(0), but when the slide (n) is drawn back more or less air is permitted to enterat the top of the machine.

The bran, from which the flour not separated by the previous'bolting operations enters the apparatus by the hopper (d) and falling on the runner (g) is distributed bythe centrifugal force to the periphery, and while descending between the revolving head (9) and the casing (c) is beaten by the" moving and stationary spikes. It then falls, or is carried down by the draft, into the lower part of theflmachine, which is surrounded by the bolting cloth, and being there operated onby theblast from the fan, which is supplied with air partly by that which enters at the hopperwith the bran, and partly by that which enters by the tube (Z) below.

The blast drives the flour separated from the bran by the previous beating, through the bolting cloth (6) into the chamber between the bolt and the sheet iron casing (f), from which it falls throu h passages (19). into a chamber provided or its reception.

part as a bolting apparatus substantially as 15 described, for the purpose of separating the flour which adheres to the bran after undergoing the ordinary bolting; the said process being regulated and adjusted to suit the circumstances of weather &c. by admitting more or less air, either above or below by means of the registers, as set forth.

J NO. M. CARR. JAS. HUGHES. Witnesses:

LEVIN SWIGGETT, GEORGE DEVELIN. 

